Adjustable means for mounting reflectors.



PATENTBD PEAB. 24, 1903.

J. KINBY, JR. ADJUSTABLE MEANS POR MOUNTING REPLNCTORS.

APPLICATION FILED MAY 5 1902.

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IlvEnnI PATENTED FEB. 24, 1903. J. KINBY2 JR.' ADJUSTABLE MEANS FORMOUNTING RBPLEGTONS.

APPLICATION FILED MAY 5. 1902.

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UNITED STATES PATENT OEEICE.

JOHN KIRBY, JR., OF DAYTON, OHIO, ASSIGNOR TO UNITED STATES HEAD- LIGHTCOMPANY, OF BUFFALO, YORK, A CORPORATION OF NEW Yoan.

`ADJUSTABLE MEANS FOR MOUNTING REFLEC-TO'RS.

SPECIFICATION formingpart of Letters Patent No. 721,648, dated February24, 193.

Application filed May 5, 1902l` Serial No. 106,'000. (No model.) l

To ULZZ whom t mag/concern,.-

Be it known that I, JOHN KIRBY, Jr., a citizen of the UnitedStatesresiding in the city of Dayton, county of'Montgomery, and State ofOhio, have invented certain new and useful Improvements in AdjustableMeans for Mounting Reflectors; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled inl the art to which it appertains 1 to make anduse the same,reference being had to the accompanying drawings, and tothe letters of reference marked thereon, which form a part of thisspecification.

My invention relates to the manner of mounting reiiectors in the casesof head lights, search-lights, &c., and it is more particularly adaptedto constructions where the lamp is necessarily located at a fixed pointhorizontally of the case, and therefore not adjustable to the verticalfocal line of .the re- Hector.

In headlights and other similar types of lights wherea reiiector isemployed for the purpose of reflecting the rays of light ahead of thelamp the efficiency of the rcflectordeponds upon the location of itsfocal point relative to the burning-point of the lamp; and the object ofmy present invention is to provide improved means for mounting thereiiector whereby it can readily and accurately be adjusted soas tobring its focal point in proper relation with the center vertical linethrough the burning-point of the lamp. It consists in certain new andnovel means for securing the reflector in position, the details of whichwill hereinafter be fully described, and pointed out in the claims atthe end of this specification.

The invention is clearly illustrated in the accompanying drawings,forming a part hereof, and in which- Figure l represents in verticalsection a headlight-case containing an electric-arc lamp and an ordinaryparabolic reflector of the deep type; Fig. 2, a search-light casecontaining a similar lamp and an ordinary reiieotor of the shallow type,the case and refiector being shown in section; Fig. 3, a front view ofFig. 2, and Fig. 4 an enlarged detail sectional view of a portion of thereflector and its adjusting mechanism.

Similar letters of reference indicate correspending parts in all thefigures of the drawings.

-A represents thecase.

B represents an electric-arc lamp which for the purpose of illustratingmy invention I have selected and which may be of any suitableconstruction, in which the carbons are vertically adjustable.

C represents the reflector, provided with a flange ct and having' itsfocal point near its apex, openings h c being cut through its wallopposite its focal point for the passage of carbons B E, which arevertically movable in the usual manner. i y Y F is a reiiector of theshallow type, the focal point of which is in advance of its front angea, as shown in Fig. 2.

The case is provided with a suitable number of lugs cl,

which maybe formed integral with the body of the case or otherwisesecured thereto or supported andv into which are tapped screwthreadedstuds e, each of which is provided with a reduced portion f, having aslot g to receive a screw-driver and an interior screwthread, whichengages a nut h. The flange a of the reflector is perforated to engagethe reduced portion f of the studs e, and it has bearing against ashoulder v1, formed on each of the said studs.

By the arrangement above described any variation in forming the ange aon the-reector, whereby the distance between the focal point of thereflector and the said fiange differs in different reiiectors, can becompensated for by setting the studs e forward or backward, as may benecessary tobring the vertical focal line of the reflector to its properposition relative tov a vertical line through the center of the carbonsor other illuminating agency, thereby producing the best resultobtainable, and when the reflector is thus adjusted it is held in suchposition by means of the nuts h.

In the foregoing I have described and have shown in the drawings What Inow consider the best manner of carrying out my invention. It isobvious, however, that the details of construction may be modifiedWithout departing from the spirit thereof, and therefore I do not Wishto limit my invention to such exact details.

Havingfhus fully described my invention, I claiml. The combination witha headlight-case having lugs secured thereto, of movable supportsadapted to engage said lugs and to be moved horizontally therein, areflector' hav ing an outwardly-extending flange perforated to receivesaid movable supports, and means for securing said reflector to saidmovable supports, whereby the vertical focal line of the refiector canbe adjusted relative to the burning-point of the lamp.

2. The combination with a headlight-case, of lugs secured to the case,screw-threaded studs adapted to engage said lugs and each having areduced screw-threaded portion at one end thereof, a reflector having anoutwardly-extending flange perforated to engage said reduced portion ofsaid studs, and nuts Which engage the screw-threads of said reducedportion and secure the reflector to said studs.

In testimony whereof I hereunto subscribe my name this 2d day of May,1902.

JOHN KIRBY, JR.

